Hi Fran
On 11/07/2011 9:21, Frans Knibbe wrote:
> It was a good idea to post this announcement here!
Yes, it was .. ;)
>
> At the moment it is not really possible to publish geographical data
> in the Linked Data cloud. Well, there is the Basic Geo vocabulary from
> the W3C, and it is widely used, but it does not allow coding
> geometries other than points, and it does not allow for arbitrary
> coordinate systems. There is a wealth of rich geographical data out
> there, but it is mostly still locked up in silos. A standard like this
> could change that.
We have GeoLinkedData [1], which aims to enrich the Web of Data with
Spanish geospatial data.
We are publishing points and linestrings, and we have two tools for
supporting these geometries, geometry2rdf [2], and map4rdf[3].
Yes, we have more geospatial information out there, and we hope this
standard will be a step forward to enrich the Web of Data with more
geospatial linked data.
<http://oegdev.dia.fi.upm.es/projects/map4rdf/>
>
> I really hope that some Linked Data experts can find some time to
> assess this candidate standard, and help the geospatial community on
> its way to 'splendid assimilation'.
We have already provided some comments.
Thanks
Boris
[1] http://geo.linkeddata.es <http://geo.linkeddata.es/>
[2] http://mccarthy.dia.fi.upm.es/geometry2rdf/
[3] http://oegdev.dia.fi.upm.es/projects/map4rdf/
>
> Regards,
> Frans
>
> On 2011-07-08 14:57, John Goodwin wrote:
>>
>> The Open Geospatial Consortium (OGCÂ®) seeks public comment on the
>> candidate OGC "GeoSPARQL: A Geographic Query Language for RDF Data"
>> Standard. The candidate OGC GeoSPARQL standard defines spatial
>> extensions to the W3C's SPARQL protocol and RDF query language.
>>
>> SPARQL is a protocol and query language for the Semantic Web. SPARQL
>> is defined in terms of the W3C's RDF data model and will work for any
>> data source that can be mapped into RDF, which potentially includes
>> sources of geospatial data. The OGC GeoSPARQL standard supports
>> representing and querying geospatial data on the Semantic Web.
>> GeoSPARQL provides the foundational geospatial vocabulary for linked
>> data involving location and defines extensions to SPARQL for
>> processing geospatial data. This standard serves as a common target
>> for vendors to implement and provides rich functionality for building
>> geospatial applications.
>>
>> GeoSPARQL follows a modular design. A /core/ component defines
>> top-level RDFS/OWL classes for spatial objects. A /geometry/
>> component defines RDFS data types for serializing geometry data,
>> RDFS/OWL classes for geometry object types, geometry-related RDF
>> properties, and non-topological spatial query functions for geometry
>> objects. A /geometry/ /topology/ component defines topological query
>> functions. A /topological/ /vocabulary/ component defines RDF
>> properties for asserting topological relations between spatial
>> objects, and a /query/ /rewrite/ component defines rules for
>> transforming a simple triple pattern that tests a topological
>> relation between two features into an equivalent query involving
>> concrete geometries and topological query functions.
>>
>> The candidate OGC GeoSPARQL Standard documents are available for
>> review and comment below.
>>
>> http://www.opengeospatial.org/standards/requests/80
>>
>> John
>>
>> *Dr John Goodwin*
>> *Research Scientist, Research, Ordnance Survey*
>> Adanac Drive, SOUTHAMPTON, UK, SO16 0ASPhone: +44 (0) 23 8005 5761
>> www.ordnancesurvey.co.uk| john.goodwin@ordnancesurvey.co.uk
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>>
>